Roof Nails Sweating

It can lead to roof leaks even if rain has not occurred for several days.

Roof nails sweating.

It should to a degree. Edge clip requirements depend on the relationship of the panel span rating to the actual distance between roof framing. Metal gets cold faster than other items so condensation begins on metal first. Although moisture problems in the roof assembly can be due to waterproofing deficiencies don t neglect the effect of condensation.

And just one rusted out nail can cause your roof to leak every time it rains. Condensation is usually first noticed on your windows and skylights because they are the most visible areas of your house. Frost on nails is frozen condensation. Before hurricane andrew devastated south florida in 1992 roof sheathing was generally attached using 6d nails spaced at 6 inches along the edges of the sheathing and at 12 inches along interior.

Condensation happens when moisture filled air contacts anything that is below the dew point temperature. When the attic heats up a bit during the day the frost melts and drips then the nails frost up at night again and so on. Condensation is a common sign of inadequate insulation and or ventilation. Condensation is more apt to occur in climates where the average temperature is 35º f or colder.

These nails will eventually rust. It s important to realize frost is in your attic for a few reasons. Roof sheathing panel spacing hints. Remember the last hot and humid day you were sitting outside drinking a cold beer iced tea soda or glass of ice water.

Condensation in the home a warning sign. But with proper design and maintenance principles you don t have to sweat roof condensation issues. Sometimes you can spot this if you climb up into your attic on a cold night. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels.

If shingles get lifted or torn from high winds the damaged shingle exposes nails holding the shingle below it. If your roof deck or insulation is developing water droplets chances are your forehead is too. Moisture that escapes into the cold attic from the rooms below often condenses on cold nails. Frost on nails in attic spaces may frighten you.